Is ROT13 / Caesar Cipher free?

Yes, ROT13 / Caesar Cipher is completely free to use with no signup required.

Does ROT13 / Caesar Cipher send my data to a server?

No. ROT13 / Caesar Cipher runs entirely in your browser using client-side JavaScript. Your data never leaves your device.

Encrypt or decrypt strings using character rotation ciphers (ROT13 or custom shifts) client-side in your browser.

DevTab

Never leaves your browser

Process character rotation shifts for Caesar and ROT13 ciphers.

Cipher Shift KeyShift: 13

Standard Presets

Original Plain Text

Shifted Cipher Output

27 B1 linesShift: 13 | Key: ROT13